A block of mass is pulled along a horizontal surface by a force at an angle with the horizontal. The friction coefficient between the block and the surface is . The work done by the force in a displacement of of the block is:
- A
- B
- C
- D
A block of mass is pulled along a horizontal surface by a force at an angle with the horizontal. The friction coefficient between the block and the surface is . The work done by the force in a displacement of of the block is:
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